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Search: id:A141025
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| A141025 |
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a(n)=3a(n-1)-a(n-2)-3a(n-3)+2a(n-4) with a(0)=a(1)=a(2)=1,a(3)=5. Also for differences which first are 4*(0, A000975). |
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+0
1
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| 1, 1, 1, 5, 13, 33, 73, 157, 325, 665, 1345, 2709, 5437, 10897, 21817, 43661
(list; graph; listen)
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OFFSET
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0,4
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FORMULA
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a(n+1)-2a(n)= -1, -1, 3, 3, 7, 7, 11, 11 see A004767. Also A001045(n+2) - A005843.
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CROSSREFS
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Sequence in context: A066184 A146924 A001981 this_sequence A100227 A027051 A109786
Adjacent sequences: A141022 A141023 A141024 this_sequence A141026 A141027 A141028
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KEYWORD
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nonn,uned
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Jul 29 2008
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